/* roulang page: index */
:root {
            --gold: #FFD700;
            --red: #D32F2F;
            --green: #0A2E1C;
            --forest: #123E25;
            --mint: #D1F2EB;
            --white: #FFFFFF;
            --text-soft: #A8C9BE;
            --border-gold: rgba(255, 215, 0, 0.3);
            --shadow-gold: 0 8px 30px rgba(255, 215, 0, 0.15);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Be Vietnam Pro', 'Inter', system-ui, sans-serif;
            background: var(--green);
            color: var(--white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }
        button:focus-visible, a:focus-visible {
            outline: 2px solid var(--gold);
            outline-offset: 3px;
            border-radius: 4px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .text-gradient-gold {
            background: linear-gradient(135deg, #FFD700 0%, #FFF2A8 40%, #D4AF37 70%, #FFD700 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .btn-gold {
            background: linear-gradient(135deg, #FFD700 0%, #E6B800 50%, #FFD700 100%);
            color: #0A2E1C;
            font-weight: 700;
            padding: 14px 28px;
            border-radius: 9999px;
            border: none;
            cursor: pointer;
            transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: 0 4px 18px rgba(255, 215, 0, 0.35);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.02em;
            font-size: 1rem;
        }
        .btn-gold:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(255, 215, 0, 0.5);
            background: linear-gradient(135deg, #FFE033 0%, #FFD700 50%, #F0C200 100%);
        }
        .btn-gold:active {
            transform: translateY(-1px);
            box-shadow: 0 3px 12px rgba(255, 215, 0, 0.3);
        }
        .btn-outline-gold {
            background: transparent;
            color: var(--gold);
            font-weight: 600;
            padding: 14px 28px;
            border-radius: 9999px;
            border: 2px solid var(--gold);
            cursor: pointer;
            transition: all 0.35s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.02em;
            font-size: 1rem;
        }
        .btn-outline-gold:hover {
            background: rgba(255, 215, 0, 0.1);
            box-shadow: 0 0 20px rgba(255, 215, 0, 0.25);
            transform: translateY(-2px);
        }
        .card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            backdrop-filter: blur(10px);
        }
        .card:hover {
            border-color: var(--border-gold);
            box-shadow: var(--shadow-gold);
            transform: translateY(-5px);
            background: rgba(255, 255, 255, 0.06);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 9999px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }
        .badge-hot {
            background: rgba(211, 47, 47, 0.15);
            color: #FF6B6B;
            border: 1px solid rgba(211, 47, 47, 0.4);
        }
        .badge-new {
            background: rgba(255, 215, 0, 0.15);
            color: var(--gold);
            border: 1px solid rgba(255, 215, 0, 0.4);
        }
        .badge-secure {
            background: rgba(46, 204, 113, 0.15);
            color: #2ECC71;
            border: 1px solid rgba(46, 204, 113, 0.4);
        }
        .header-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 215, 0, 0.15);
            transition: all 0.3s ease;
        }
        .header-nav.scrolled {
            background: rgba(10, 46, 28, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0;
            gap: 20px;
        }
        .logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--gold);
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.2;
            max-width: 220px;
        }
        .logo-text i {
            color: var(--gold);
            font-size: 1.6rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            transition: all 0.3s ease;
            position: relative;
            padding: 6px 0;
        }
        .nav-links a:hover {
            color: var(--gold);
        }
        .nav-links a.active {
            color: var(--gold);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--gold);
            border-radius: 2px;
        }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login-text {
            color: var(--white);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 10px 18px;
            border-radius: 9999px;
            transition: all 0.3s ease;
            background: transparent;
            border: none;
            cursor: pointer;
        }
        .btn-login-text:hover {
            color: var(--gold);
        }
        .btn-signup {
            background: var(--gold);
            color: #0A2E1C;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 10px 22px;
            border-radius: 9999px;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 14px rgba(255, 215, 0, 0.3);
        }
        .btn-signup:hover {
            background: #FFE033;
            box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
            transform: translateY(-2px);
        }
        .mobile-menu-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--gold);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
        }
        .mobile-menu {
            display: none;
            background: rgba(10, 46, 28, 0.98);
            border-bottom: 1px solid rgba(255, 215, 0, 0.2);
            padding: 16px 24px;
            flex-direction: column;
            gap: 14px;
        }
        .mobile-menu a {
            color: rgba(255, 255, 255, 0.8);
            font-weight: 500;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .mobile-menu a.active {
            color: var(--gold);
        }
        .mobile-menu .nav-auth {
            flex-direction: row;
            gap: 12px;
            padding-top: 10px;
        }
        .mobile-menu .btn-login-text,
        .mobile-menu .btn-signup {
            flex: 1;
            text-align: center;
        }
        .hero-section {
            padding: 140px 0 80px;
            position: relative;
            overflow: hidden;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(10, 46, 28, 0.95) 0%, rgba(18, 62, 37, 0.9) 50%, rgba(10, 46, 28, 0.95) 100%);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(10, 46, 28, 0.3) 0%, rgba(10, 46, 28, 0.9) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .hero-badge-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 24px;
            color: var(--white);
        }
        .hero-subtitle {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 680px;
        }
        .hero-cta-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--gold);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: rgba(255, 255, 255, 0.02);
        }
        .section-header {
            margin-bottom: 48px;
            max-width: 720px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--gold);
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--white);
        }
        .section-desc {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid rgba(255, 215, 0, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gold);
            font-size: 1.5rem;
            margin-bottom: 20px;
            transition: all 0.3s ease;
        }
        .card:hover .feature-icon {
            background: rgba(255, 215, 0, 0.2);
            box-shadow: 0 0 24px rgba(255, 215, 0, 0.25);
            transform: scale(1.05);
        }
        .feature-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--white);
        }
        .feature-desc {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.65;
        }
        .app-showcase {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .app-image-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(255, 215, 0, 0.25);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
            position: relative;
        }
        .app-image-wrap img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .app-image-wrap:hover img {
            transform: scale(1.03);
        }
        .app-image-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: rgba(211, 47, 47, 0.9);
            color: var(--white);
            padding: 8px 18px;
            border-radius: 9999px;
            font-weight: 700;
            font-size: 0.85rem;
            box-shadow: 0 4px 16px rgba(211, 47, 47, 0.5);
        }
        .step-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-top: 28px;
        }
        .step-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #FFD700, #E6B800);
            color: #0A2E1C;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 1.1rem;
        }
        .step-content {
            flex: 1;
        }
        .step-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--white);
        }
        .step-content p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.6;
        }
        .guarantee-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            background: rgba(255, 215, 0, 0.06);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: var(--radius-lg);
            padding: 32px;
        }
        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 14px;
            color: rgba(255, 255, 255, 0.8);
            font-weight: 500;
            font-size: 0.95rem;
        }
        .guarantee-item i {
            color: var(--gold);
            font-size: 1.4rem;
            flex-shrink: 0;
        }
        .promo-banner {
            background: linear-gradient(135deg, rgba(211, 47, 47, 0.15) 0%, rgba(10, 46, 28, 0.6) 50%, rgba(255, 215, 0, 0.1) 100%);
            border: 2px solid rgba(255, 215, 0, 0.3);
            border-radius: var(--radius-lg);
            padding: 48px;
            position: relative;
            overflow: hidden;
        }
        .promo-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.2) 0%, transparent 70%);
            border-radius: 50%;
        }
        .promo-banner-content {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }
        .promo-banner-text {
            flex: 1;
            min-width: 280px;
        }
        .promo-banner-text h3 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--gold);
            margin-bottom: 12px;
        }
        .promo-banner-text p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.6;
        }
        .countdown-box {
            display: flex;
            gap: 12px;
        }
        .countdown-item {
            background: rgba(0, 0, 0, 0.4);
            border: 1px solid rgba(255, 215, 0, 0.3);
            border-radius: 12px;
            padding: 14px 18px;
            text-align: center;
            min-width: 70px;
        }
        .countdown-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--gold);
            line-height: 1;
        }
        .countdown-label {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.3s ease;
        }
        .news-item:hover {
            padding-left: 12px;
            border-bottom-color: rgba(255, 215, 0, 0.3);
        }
        .news-item-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid rgba(255, 215, 0, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gold);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .news-item-content {
            flex: 1;
        }
        .news-item-title {
            font-weight: 600;
            font-size: 1rem;
            color: var(--white);
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .news-item-meta {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
            display: flex;
            gap: 16px;
            align-items: center;
        }
        .news-item-category {
            color: var(--gold);
            font-weight: 500;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .faq-item:hover {
            border-color: rgba(255, 215, 0, 0.3);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--white);
            gap: 16px;
            transition: all 0.3s ease;
        }
        .faq-question:hover {
            color: var(--gold);
        }
        .faq-question i {
            color: var(--gold);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item.open .faq-answer {
            max-height: 200px;
            padding: 0 24px 20px;
        }
        .footer {
            background: rgba(0, 0, 0, 0.3);
            border-top: 1px solid rgba(255, 215, 0, 0.2);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--gold);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-desc {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .footer-column h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            transition: all 0.3s ease;
        }
        .footer-links a:hover {
            color: var(--gold);
            padding-left: 6px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-copyright {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-legal {
            display: flex;
            gap: 20px;
            align-items: center;
        }
        .footer-legal a {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            transition: color 0.3s ease;
        }
        .footer-legal a:hover {
            color: var(--gold);
        }
        .badge-18 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 2px solid var(--red);
            color: var(--red);
            font-weight: 800;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #1A1A1A, #0A0A0A);
            border: 3px solid var(--gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gold);
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            opacity: 0.7;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            animation: fabBreath 3s ease-in-out infinite;
        }
        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 32px rgba(255, 215, 0, 0.5);
        }
        .fab:active {
            transform: scale(0.95) translateY(2px);
        }
        .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--red);
            border: 2px solid #0A0A0A;
            animation: blink 2s ease-in-out infinite;
        }
        @keyframes fabBreath {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }
        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }
        .vertical-card {
            display: flex;
            flex-direction: column;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.4s ease;
        }
        .vertical-card:hover {
            border-color: rgba(255, 215, 0, 0.35);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
            transform: translateY(-6px);
        }
        .vertical-card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .vertical-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .vertical-card:hover .vertical-card-img img {
            transform: scale(1.05);
        }
        .vertical-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .vertical-card-title {
            font-weight: 700;
            font-size: 1rem;
            color: var(--white);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .vertical-card-desc {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.6;
            margin-bottom: 14px;
            flex: 1;
        }
        .vertical-card-cta {
            color: var(--gold);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.3s ease;
        }
        .vertical-card-cta:hover {
            gap: 10px;
        }
        .comparison-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(255, 215, 0, 0.25);
        }
        .comparison-table th, .comparison-table td {
            padding: 18px 24px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .comparison-table th {
            background: rgba(255, 215, 0, 0.1);
            font-weight: 700;
            color: var(--gold);
            font-size: 0.95rem;
        }
        .comparison-table td {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .comparison-table .highlight-col {
            background: rgba(255, 215, 0, 0.06);
            border-left: 2px solid var(--gold);
            border-right: 2px solid var(--gold);
        }
        .comparison-table .highlight-col td {
            color: var(--white);
            font-weight: 500;
        }
        .comparison-badge {
            display: inline-block;
            background: var(--gold);
            color: #0A2E1C;
            font-weight: 700;
            font-size: 0.75rem;
            padding: 4px 12px;
            border-radius: 9999px;
            margin-bottom: 8px;
        }
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.75rem;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .guarantee-strip {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-auth {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .mobile-menu.open {
                display: flex;
            }
            .hero-section {
                padding: 120px 0 60px;
                min-height: auto;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .grid-3, .grid-2 {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .app-showcase {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .app-image-wrap img {
                height: 260px;
            }
            .guarantee-strip {
                grid-template-columns: 1fr;
                padding: 24px;
            }
            .promo-banner {
                padding: 32px 24px;
            }
            .promo-banner-text h3 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 12px;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .hero-stats {
                gap: 20px;
            }
            .hero-stat-value {
                font-size: 1.6rem;
            }
            .countdown-box {
                gap: 8px;
            }
            .countdown-item {
                min-width: 56px;
                padding: 10px 12px;
            }
            .countdown-value {
                font-size: 1.4rem;
            }
            .comparison-table th, .comparison-table td {
                padding: 12px 16px;
                font-size: 0.82rem;
            }
            .fab {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 1.65rem;
            }
            .hero-cta-row {
                flex-direction: column;
                gap: 12px;
            }
            .btn-gold, .btn-outline-gold {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
                font-size: 0.9rem;
            }
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .hero-stat {
                min-width: 45%;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .logo-text {
                font-size: 1.1rem;
                max-width: 180px;
            }
            .logo-text i {
                font-size: 1.3rem;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --bg-card: #1C1C1E;
            --bg-elevated: #242428;
            --accent-primary: #FF4500;
            --accent-secondary: #FF7A00;
            --accent-glow: #FFD700;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --text-muted: #8A8A8A;
            --border-subtle: rgba(255, 69, 0, 0.25);
            --border-active: #FF4500;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 24px rgba(255, 69, 0, 0.35);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            color: inherit;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Navigation */
        .header-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 69, 0, 0.2);
            transition: var(--transition);
        }

        .header-nav.scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 20px;
        }

        .logo-text {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .logo-text i {
            color: var(--accent-primary);
            font-size: 1.5rem;
            text-shadow: 0 0 16px rgba(255, 69, 0, 0.6);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            flex-wrap: wrap;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(255, 69, 0, 0.1);
        }

        .nav-links a.active {
            color: var(--accent-primary);
            background: rgba(255, 69, 0, 0.15);
            box-shadow: inset 0 0 0 1px rgba(255, 69, 0, 0.3);
        }

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .btn-login-text {
            padding: 8px 16px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-login-text:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.08);
        }

        .btn-signup {
            padding: 10px 22px;
            font-size: 0.9rem;
            font-weight: 700;
            color: #FFFFFF;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 16px rgba(255, 69, 0, 0.4);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 69, 0, 0.55);
        }

        .btn-signup:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(255, 69, 0, 0.3);
        }

        .mobile-menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-primary);
            transition: var(--transition);
        }

        .mobile-menu-toggle:hover {
            background: rgba(255, 69, 0, 0.15);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            padding: 16px 24px 24px;
            background: rgba(22, 22, 22, 0.98);
            border-bottom: 1px solid rgba(255, 69, 0, 0.2);
            gap: 6px;
        }

        .mobile-menu a {
            padding: 12px 16px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--text-primary);
            background: rgba(255, 69, 0, 0.12);
        }

        .mobile-menu .nav-auth {
            margin-top: 12px;
            flex-direction: row;
            gap: 10px;
        }

        /* Article Page */
        .article-page {
            padding: 40px 0 80px;
            min-height: 60vh;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .article-breadcrumb a {
            color: var(--text-muted);
            transition: var(--transition);
        }

        .article-breadcrumb a:hover {
            color: var(--accent-primary);
        }

        .article-breadcrumb .separator {
            color: var(--text-muted);
            opacity: 0.6;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr);
            gap: 40px;
            max-width: 820px;
            margin: 0 auto;
        }

        .article-header {
            margin-bottom: 32px;
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent-primary);
            background: rgba(255, 69, 0, 0.12);
            border: 1px solid rgba(255, 69, 0, 0.3);
            border-radius: 50px;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .article-header h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .article-meta i {
            color: var(--accent-primary);
            margin-right: 6px;
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 36px 0 16px;
            line-height: 1.35;
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 28px 0 12px;
            line-height: 1.4;
        }

        .article-content p {
            margin-bottom: 16px;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0;
            padding-left: 24px;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 8px;
        }

        .article-content ul li::marker {
            color: var(--accent-primary);
        }

        .article-content ol li::marker {
            color: var(--accent-primary);
            font-weight: 700;
        }

        .article-content blockquote {
            margin: 24px 0;
            padding: 16px 24px;
            background: rgba(255, 69, 0, 0.06);
            border-left: 4px solid var(--accent-primary);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-primary);
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-card);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-secondary);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
        }

        .article-not-found i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: block;
        }

        .article-not-found h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 700;
            color: #FFFFFF;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border-radius: var(--radius-sm);
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(255, 69, 0, 0.4);
        }

        .btn-back-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 69, 0, 0.55);
        }

        /* Article CTA */
        .article-cta {
            margin-top: 48px;
            padding: 32px;
            background: linear-gradient(135deg, rgba(255, 69, 0, 0.15), rgba(255, 122, 0, 0.1));
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            text-align: center;
        }

        .article-cta h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .article-cta p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .article-cta .btn-signup {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 1rem;
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 90;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(11, 11, 11, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid var(--accent-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-primary);
            box-shadow: 0 0 20px rgba(255, 69, 0, 0.45);
            transition: var(--transition);
            opacity: 0.65;
            cursor: pointer;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 32px rgba(255, 69, 0, 0.7);
            border-color: var(--accent-glow);
            color: var(--accent-glow);
        }

        .fab:active {
            transform: scale(0.95);
        }

        .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 16px;
            height: 16px;
            background: var(--accent-glow);
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% {
                transform: scale(1);
                opacity: 1;
            }
            50% {
                transform: scale(1.3);
                opacity: 0.7;
            }
        }

        /* Footer */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 69, 0, 0.15);
            padding: 48px 0 24px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .footer-brand i {
            color: var(--accent-primary);
            font-size: 1.4rem;
            text-shadow: 0 0 16px rgba(255, 69, 0, 0.6);
        }

        .footer-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .badge-18 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 69, 0, 0.15);
            border: 1px solid var(--accent-primary);
            border-radius: 50%;
            font-size: 0.75rem;
            font-weight: 800;
            color: var(--accent-primary);
        }

        .footer-column h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent-primary);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-auth {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .mobile-menu.open {
                display: flex;
            }
            .mobile-menu .nav-auth {
                display: flex;
            }
            .article-header h1 {
                font-size: 1.7rem;
            }
            .article-content {
                font-size: 1rem;
            }
            .article-layout {
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .fab {
                width: 48px;
                height: 48px;
                font-size: 1.3rem;
                left: 12px;
                bottom: 80px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-inner {
                height: 60px;
            }
            .logo-text {
                font-size: 1.1rem;
            }
            .logo-text i {
                font-size: 1.2rem;
            }
            .article-page {
                padding: 24px 0 60px;
            }
            .article-header h1 {
                font-size: 1.4rem;
            }
            .article-meta {
                gap: 10px;
                font-size: 0.75rem;
            }
            .article-cta {
                padding: 24px 16px;
            }
            .article-cta h3 {
                font-size: 1.2rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #0A2E1C;
            --secondary-bg: #123E25;
            --accent-gold: #FFD700;
            --accent-red: #D32F2F;
            --text-white: #FFFFFF;
            --text-mint: #D1F2EB;
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow-gold: 0 8px 30px rgba(255, 215, 0, 0.15);
            --shadow-dark: 0 12px 40px rgba(0, 0, 0, 0.45);
            --border-gold: 1px solid rgba(255, 215, 0, 0.35);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.25s ease;
        }

        img {
            max-width: 100%;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            transition: all 0.25s ease;
        }

        /* Header / Nav */
        .header-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 215, 0, 0.15);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 16px;
        }

        .logo-text {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.5rem;
            color: var(--accent-gold);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }

        .logo-text i {
            font-size: 1.7rem;
            filter: drop-shadow(0 0 6px rgba(255, 215, 0, 0.5));
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.85);
            padding: 8px 0;
            position: relative;
            transition: color 0.25s;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-gold);
            transition: width 0.3s ease;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-gold);
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login-text {
            background: transparent;
            border: none;
            color: rgba(255, 255, 255, 0.85);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 10px 16px;
            border-radius: 999px;
            transition: all 0.25s;
        }

        .btn-login-text:hover {
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.08);
        }

        .btn-signup {
            background: linear-gradient(135deg, #FFD700, #FFC107);
            color: #0A2E1C;
            font-weight: 800;
            font-size: 0.95rem;
            padding: 12px 24px;
            border-radius: 999px;
            border: none;
            box-shadow: 0 6px 20px rgba(255, 215, 0, 0.35);
            transition: all 0.3s;
            white-space: nowrap;
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, #FFE44D, #FFB300);
            box-shadow: 0 10px 28px rgba(255, 215, 0, 0.5);
            transform: translateY(-2px);
        }

        .mobile-menu-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--accent-gold);
            font-size: 1.8rem;
            padding: 8px;
        }

        .mobile-menu {
            display: none;
            background: rgba(10, 46, 28, 0.98);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 215, 0, 0.2);
            flex-direction: column;
            gap: 0;
            padding: 16px 24px 24px;
        }

        .mobile-menu a {
            padding: 14px 0;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.85);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--accent-gold);
        }

        .mobile-menu .nav-auth {
            margin-top: 16px;
            flex-direction: row;
        }

        /* Hero */
        .hero-category {
            padding: 150px 0 80px;
            position: relative;
            overflow: hidden;
            background: radial-gradient(ellipse at 30% 20%, rgba(255, 215, 0, 0.08) 0%, transparent 60%),
                linear-gradient(135deg, #0A2E1C 0%, #0D3522 50%, #09261A 100%);
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid rgba(255, 215, 0, 0.35);
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 0.85rem;
            padding: 8px 18px;
            border-radius: 999px;
            margin-bottom: 20px;
        }

        .hero-badge i {
            font-size: 0.9rem;
        }

        .hero-title {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -1px;
            color: var(--text-white);
            margin-bottom: 18px;
        }

        .hero-title .gold-text {
            color: var(--accent-gold);
            text-shadow: 0 0 30px rgba(255, 215, 0, 0.4);
        }

        .hero-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 520px;
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            margin-bottom: 24px;
        }

        .btn-gold {
            background: linear-gradient(135deg, #FFD700, #FFB300);
            color: #0A2E1C;
            font-weight: 800;
            font-size: 1rem;
            padding: 16px 32px;
            border-radius: 14px;
            border: none;
            box-shadow: 0 8px 24px rgba(255, 215, 0, 0.4);
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-gold:hover {
            background: linear-gradient(135deg, #FFE44D, #FFB300);
            box-shadow: 0 12px 34px rgba(255, 215, 0, 0.55);
            transform: translateY(-3px);
        }

        .btn-outline-gold {
            background: transparent;
            border: 2px solid rgba(255, 215, 0, 0.6);
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: 14px;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-outline-gold:hover {
            background: rgba(255, 215, 0, 0.1);
            border-color: var(--accent-gold);
            transform: translateY(-3px);
        }

        .countdown-bar {
            display: flex;
            align-items: center;
            gap: 16px;
            background: rgba(0, 0, 0, 0.35);
            border: 1px solid rgba(255, 215, 0, 0.25);
            border-radius: 16px;
            padding: 14px 22px;
            max-width: fit-content;
            flex-wrap: wrap;
        }

        .countdown-item {
            text-align: center;
            min-width: 50px;
        }

        .countdown-item .num {
            font-size: 1.6rem;
            font-weight: 900;
            color: var(--accent-gold);
            line-height: 1.2;
        }

        .countdown-item .label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: rgba(255, 255, 255, 0.55);
        }

        .countdown-sep {
            font-size: 1.5rem;
            color: rgba(255, 255, 255, 0.4);
            font-weight: 300;
        }

        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-visual img {
            border-radius: 28px;
            box-shadow: var(--shadow-dark);
            border: 2px solid rgba(255, 215, 0, 0.3);
            object-fit: cover;
            width: 100%;
            max-height: 420px;
            transition: transform 0.5s ease;
        }

        .hero-visual:hover img {
            transform: scale(1.02);
        }

        .floating-badge {
            position: absolute;
            bottom: 24px;
            right: 20px;
            background: var(--accent-red);
            color: #fff;
            font-weight: 800;
            font-size: 0.85rem;
            padding: 12px 20px;
            border-radius: 999px;
            box-shadow: 0 8px 24px rgba(211, 47, 47, 0.5);
            display: flex;
            align-items: center;
            gap: 8px;
            animation: pulse-badge 2s infinite;
        }

        @keyframes pulse-badge {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.05); }
        }

        /* Steps */
        .steps-section {
            padding: 80px 0;
            background: var(--secondary-bg);
        }

        .section-heading {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
        }

        .section-sub {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 40px;
        }

        .steps-flow {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 50px;
        }

        .step-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 215, 0, 0.18);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            transition: all 0.35s;
            position: relative;
            overflow: hidden;
        }

        .step-card:hover {
            border-color: rgba(255, 215, 0, 0.45);
            background: rgba(255, 255, 255, 0.06);
            transform: translateY(-6px);
            box-shadow: var(--shadow-gold);
        }

        .step-number {
            font-size: 3rem;
            font-weight: 900;
            color: rgba(255, 215, 0, 0.15);
            position: absolute;
            top: 12px;
            right: 20px;
            line-height: 1;
        }

        .step-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 215, 0, 0.05));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.5rem;
            margin-bottom: 18px;
        }

        .step-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step-card p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            line-height: 1.65;
        }

        /* Interactive */
        .interactive-section {
            padding: 80px 0;
            background: var(--primary-bg);
        }

        .interactive-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .interactive-text h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .interactive-text p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.05rem;
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .check-list {
            list-style: none;
            margin-bottom: 24px;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 12px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        .check-list li i {
            color: var(--accent-gold);
            font-size: 1.1rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        .interactive-visual {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: var(--radius-lg);
            padding: 36px;
            position: relative;
        }

        .interactive-visual img {
            border-radius: 18px;
            border: 1px solid rgba(255, 215, 0, 0.25);
            box-shadow: var(--shadow-dark);
        }

        .download-tag {
            position: absolute;
            top: 20px;
            left: 20px;
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 800;
            font-size: 0.8rem;
            padding: 8px 16px;
            border-radius: 999px;
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.4);
        }

        /* Common Issues */
        .issues-section {
            padding: 80px 0;
            background: var(--secondary-bg);
        }

        .issues-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .issue-item {
            background: rgba(255, 255, 255, 0.03);
            border-left: 4px solid var(--accent-gold);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 24px 28px;
            transition: all 0.3s;
        }

        .issue-item:hover {
            background: rgba(255, 255, 255, 0.06);
            border-left-color: var(--accent-red);
        }

        .issue-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .issue-item h4 i {
            color: var(--accent-red);
            font-size: 1rem;
        }

        .issue-item p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.92rem;
            line-height: 1.65;
        }

        /* Success Case */
        .case-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #0A2E1C, #0E3A24);
        }

        .case-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 215, 0, 0.22);
            border-radius: var(--radius-lg);
            padding: 40px;
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 36px;
            align-items: center;
            transition: all 0.35s;
        }

        .case-card:hover {
            border-color: rgba(255, 215, 0, 0.45);
            box-shadow: var(--shadow-gold);
        }

        .case-image img {
            border-radius: 18px;
            border: 2px solid rgba(255, 215, 0, 0.3);
            box-shadow: var(--shadow-dark);
        }

        .case-content h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 14px;
            color: var(--accent-gold);
        }

        .case-content p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .case-stats {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }

        .case-stat {
            text-align: left;
        }

        .case-stat .value {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--accent-gold);
        }

        .case-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(255, 215, 0, 0.1) 0%, transparent 70%), var(--primary-bg);
        }

        .cta-box {
            background: linear-gradient(135deg, rgba(255, 215, 0, 0.12), rgba(255, 215, 0, 0.04));
            border: 2px solid rgba(255, 215, 0, 0.35);
            border-radius: 32px;
            padding: 56px 48px;
            text-align: center;
            box-shadow: var(--shadow-dark);
        }

        .cta-box h2 {
            font-size: 2.4rem;
            font-weight: 900;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .cta-box p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* Footer */
        .footer {
            background: #081F15;
            border-top: 1px solid rgba(255, 215, 0, 0.15);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.4rem;
            color: var(--accent-gold);
            margin-bottom: 16px;
        }

        .footer-brand i {
            font-size: 1.6rem;
        }

        .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 340px;
        }

        .badge-18 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--accent-red);
            color: #fff;
            font-weight: 900;
            font-size: 0.85rem;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }

        .footer-column h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color 0.25s;
        }

        .footer-links a:hover {
            color: var(--accent-gold);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }

        .footer-bottom p {
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.85rem;
        }

        .footer-payment {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .footer-payment span {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 6px 14px;
            border-radius: 8px;
            font-size: 0.8rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.7);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 96px;
            z-index: 90;
            width: 56px;
            height: 56px;
            background: rgba(10, 46, 28, 0.85);
            backdrop-filter: blur(12px);
            border: 2px solid var(--accent-gold);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.4rem;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            transition: all 0.3s;
            opacity: 0.7;
            animation: fab-float 3s infinite;
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 30px rgba(255, 215, 0, 0.5);
        }

        .fab-left:active {
            transform: scale(0.95);
        }

        @keyframes fab-float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-title {
                font-size: 2.6rem;
            }
            .interactive-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .case-card {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-auth {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .mobile-menu.open {
                display: flex;
            }
            .mobile-menu .nav-auth {
                display: flex;
            }
            .hero-category {
                padding: 120px 0 60px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .steps-flow {
                grid-template-columns: 1fr;
            }
            .issues-grid {
                grid-template-columns: 1fr;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .countdown-bar {
                gap: 10px;
                padding: 12px 16px;
            }
            .countdown-item .num {
                font-size: 1.3rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-inner {
                height: 64px;
            }
            .logo-text {
                font-size: 1.2rem;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .btn-gold,
            .btn-outline-gold {
                padding: 14px 22px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .section-heading {
                font-size: 1.7rem;
            }
            .case-card {
                padding: 24px;
            }
            .case-stats {
                gap: 16px;
            }
            .fab-left {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }

/* roulang page: category2 */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-1: #FF4500;
            --accent-2: #FF0000;
            --accent-gold: #FFD700;
            --text-white: #FFFFFF;
            --text-warm: #CCCCCC;
            --border-glow: rgba(255, 69, 0, 0.5);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-neon: 0 0 20px rgba(255, 69, 0, 0.4);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.3);
            --transition: all 0.25s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', 'Roboto', system-ui, sans-serif;
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            min-height: 100vh;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* HEADER */
        .header-nav {
            background: rgba(11, 11, 11, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 69, 0, 0.3);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: var(--transition);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .logo-text {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            text-decoration: none;
            letter-spacing: -0.5px;
            white-space: nowrap;
        }
        .logo-text i {
            color: var(--accent-gold);
            filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.6));
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 24px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-links a {
            color: var(--text-warm);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            padding: 8px 0;
            border-bottom: 2px solid transparent;
            white-space: nowrap;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--accent-gold);
            border-bottom-color: var(--accent-1);
        }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .btn-login-text {
            background: transparent;
            border: none;
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            padding: 10px 16px;
            transition: var(--transition);
        }
        .btn-login-text:hover {
            color: var(--accent-gold);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
            border: none;
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 10px 20px;
            border-radius: 30px;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(255, 69, 0, 0.5);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-signup:hover {
            box-shadow: 0 0 25px rgba(255, 69, 0, 0.8);
            transform: scale(1.03);
        }
        .mobile-menu-toggle {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 8px;
        }
        .mobile-menu {
            display: none;
            background: var(--secondary-bg);
            border-top: 1px solid rgba(255, 69, 0, 0.3);
            padding: 16px 24px;
            flex-direction: column;
            gap: 12px;
        }
        .mobile-menu a {
            color: var(--text-warm);
            text-decoration: none;
            font-weight: 600;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            transition: var(--transition);
        }
        .mobile-menu a.active {
            color: var(--accent-gold);
        }
        /* HERO */
        .hero {
            background: linear-gradient(135deg, rgba(255,69,0,0.15) 0%, rgba(22,22,22,0.9) 40%, #0B0B0B 100%), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            padding: 80px 0 60px;
            border-bottom: 1px solid rgba(255,69,0,0.3);
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255,69,0,0.25) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .hero-badge {
            background: rgba(255,69,0,0.2);
            border: 1px solid var(--accent-1);
            color: var(--accent-gold);
            padding: 6px 16px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.85rem;
            letter-spacing: 0.5px;
            display: inline-block;
            margin-bottom: 20px;
        }
        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }
        .hero h1 span {
            color: var(--accent-gold);
            text-shadow: 0 0 15px rgba(255,215,0,0.5);
        }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-warm);
            max-width: 700px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary {
            background: linear-gradient(135deg, #FF4500, #FF0000);
            border: none;
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: 40px;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(255,69,0,0.6);
            transition: var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            box-shadow: 0 0 35px rgba(255,69,0,0.9);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            border: 1px solid var(--accent-gold);
            color: var(--accent-gold);
            font-weight: 700;
            padding: 14px 28px;
            border-radius: 40px;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-outline:hover {
            background: rgba(255,215,0,0.1);
            box-shadow: var(--shadow-gold);
        }
        /* FLASH SALE */
        .flash-sale {
            background: linear-gradient(90deg, #1A0505, #2A0A0A, #1A0505);
            border-top: 2px solid var(--accent-2);
            border-bottom: 2px solid var(--accent-2);
            padding: 20px 0;
            overflow: hidden;
        }
        .flash-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .flash-left {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .flash-icon {
            font-size: 2.2rem;
            color: var(--accent-gold);
            animation: pulse 1.5s infinite;
        }
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }
        .flash-title {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
        }
        .flash-title span {
            color: var(--accent-gold);
        }
        .countdown {
            display: flex;
            gap: 8px;
            align-items: center;
        }
        .countdown-item {
            background: #0B0B0B;
            border: 1px solid var(--accent-1);
            border-radius: 8px;
            padding: 8px 12px;
            text-align: center;
            min-width: 50px;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--accent-gold);
        }
        .countdown-label {
            font-size: 0.7rem;
            color: var(--text-warm);
            text-transform: uppercase;
        }
        .btn-flash {
            background: linear-gradient(135deg, #FFD700, #FF8C00);
            color: #0B0B0B;
            font-weight: 900;
            padding: 14px 32px;
            border-radius: 40px;
            border: none;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(255,215,0,0.6);
            transition: var(--transition);
            font-size: 1rem;
            white-space: nowrap;
        }
        .btn-flash:hover {
            box-shadow: 0 0 35px rgba(255,215,0,0.9);
            transform: scale(1.05);
        }
        /* MAIN SECTIONS */
        main {
            padding: 60px 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            color: #fff;
        }
        .section-subtitle {
            color: var(--text-warm);
            font-size: 1.1rem;
            margin-bottom: 40px;
            max-width: 700px;
            line-height: 1.7;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .card {
            background: var(--secondary-bg);
            border: 1px solid rgba(255,69,0,0.3);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            border-color: var(--accent-1);
            box-shadow: 0 0 25px rgba(255,69,0,0.3);
            transform: translateY(-4px);
        }
        .card-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--accent-1);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 800;
            padding: 4px 10px;
            border-radius: 20px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .card-icon {
            font-size: 2.5rem;
            color: var(--accent-gold);
            margin-bottom: 16px;
        }
        .card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .card p {
            color: var(--text-warm);
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .card-price {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--accent-gold);
            margin-bottom: 12px;
        }
        .card-price small {
            font-size: 1rem;
            color: var(--text-warm);
            font-weight: 400;
        }
        .btn-card {
            background: transparent;
            border: 1px solid var(--accent-1);
            color: var(--accent-gold);
            padding: 10px 20px;
            border-radius: 30px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            width: 100%;
        }
        .btn-card:hover {
            background: var(--accent-1);
            color: #fff;
        }
        /* STEP GUIDE */
        .steps-container {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 30px;
        }
        .step-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--secondary-bg);
            border-radius: var(--radius-md);
            padding: 20px;
            border-left: 4px solid var(--accent-1);
            transition: var(--transition);
        }
        .step-item:hover {
            background: #1E1E1E;
            border-left-color: var(--accent-gold);
        }
        .step-number {
            background: var(--accent-1);
            color: #fff;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .step-content h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-content p {
            color: var(--text-warm);
            line-height: 1.6;
        }
        /* COMMON ISSUES */
        .issue-box {
            background: var(--secondary-bg);
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px dashed rgba(255,69,0,0.5);
        }
        .issue-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 16px;
        }
        .issue-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-warm);
            font-size: 1rem;
            line-height: 1.7;
        }
        .issue-list i {
            color: var(--accent-gold);
            margin-top: 4px;
        }
        /* SUCCESS CASES */
        .case-card {
            background: linear-gradient(135deg, #1A1A1A, #0B0B0B);
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid rgba(255,215,0,0.3);
            position: relative;
        }
        .case-card::before {
            content: '"';
            font-size: 4rem;
            color: var(--accent-1);
            position: absolute;
            top: 8px;
            left: 16px;
            opacity: 0.6;
            font-family: serif;
        }
        .case-text {
            font-style: italic;
            color: var(--text-warm);
            margin-bottom: 16px;
            padding-left: 32px;
            line-height: 1.7;
        }
        .case-author {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-left: 32px;
        }
        .case-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent-1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            color: #fff;
        }
        .case-name {
            font-weight: 700;
            color: #fff;
        }
        .case-role {
            font-size: 0.85rem;
            color: var(--text-warm);
        }
        /* FAQ */
        .faq-item {
            background: var(--secondary-bg);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid rgba(255,69,0,0.2);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent-1);
        }
        .faq-question {
            padding: 20px 24px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #fff;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question i {
            color: var(--accent-gold);
            transition: var(--transition);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 24px;
            color: var(--text-warm);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #1A0505, #2A0A0A);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: left;
            border: 1px solid var(--accent-1);
            position: relative;
            overflow: hidden;
            margin-top: 60px;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255,215,0,0.15) 0%, transparent 70%);
        }
        .cta-section h2 {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--text-warm);
            font-size: 1.1rem;
            max-width: 600px;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        /* FOOTER */
        .footer {
            background: #050505;
            border-top: 1px solid rgba(255,69,0,0.3);
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand i {
            color: var(--accent-gold);
        }
        .footer-desc {
            color: var(--text-warm);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .badge-18 {
            background: var(--accent-2);
            color: #fff;
            font-weight: 900;
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 0.9rem;
            display: inline-block;
        }
        .footer-column h4 {
            color: #fff;
            font-weight: 700;
            margin-bottom: 16px;
            font-size: 1.1rem;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a {
            color: var(--text-warm);
            text-decoration: none;
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .footer-links a:hover {
            color: var(--accent-gold);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }
        .payment-badges {
            display: flex;
            gap: 12px;
            align-items: center;
            margin-top: 16px;
            flex-wrap: wrap;
        }
        .payment-badge {
            background: var(--secondary-bg);
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: 6px;
            padding: 6px 12px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-warm);
        }
        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 99;
            background: rgba(11,11,11,0.7);
            backdrop-filter: blur(8px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(11,11,11,0.7), rgba(11,11,11,0.7)), linear-gradient(135deg, #FF4500, #FF0000);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            border-radius: 50px;
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(255,69,0,0.4);
            transition: var(--transition);
            opacity: 0.6;
        }
        .fab:hover {
            opacity: 1;
            box-shadow: 0 0 30px rgba(255,69,0,0.8);
            transform: scale(1.1);
        }
        .fab i {
            font-size: 1.5rem;
            color: var(--accent-gold);
            animation: pulse 1.8s infinite;
        }
        .fab-notification {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 12px;
            height: 12px;
            background: #FF0000;
            border-radius: 50%;
            border: 2px solid #0B0B0B;
            animation: blink 1.2s infinite;
        }
        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.2; }
        }
        /* RESPONSIVE */
        @media (max-width: 1024px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .mobile-menu-toggle { display: block; }
            .mobile-menu.active { display: flex; }
            .nav-auth { display: none; }
            .mobile-menu .nav-auth { display: flex; gap: 12px; }
            .hero { padding: 60px 0 40px; }
            .hero h1 { font-size: 2.2rem; }
            .grid-3 { grid-template-columns: 1fr; }
            .grid-2 { grid-template-columns: 1fr; }
            .flash-inner { flex-direction: column; align-items: flex-start; }
            .cta-section { padding: 40px 24px; }
            .cta-section h2 { font-size: 1.8rem; }
            .footer-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.8rem; }
            .section-title { font-size: 1.8rem; }
            .btn-primary, .btn-outline { width: 100%; justify-content: center; }
            .countdown-item { min-width: 40px; padding: 6px 8px; font-size: 1rem; }
            .card { padding: 20px; }
            .fab { left: 12px; bottom: 80px; width: 48px; height: 48px; }
        }

/* roulang page: category3 */
:root {
            --primary: #8B0000;
            --primary-dark: #4A0007;
            --accent: #FFD700;
            --accent-warm: #FF9F00;
            --bg: #4A0007;
            --surface: #5C0A0E;
            --text: #FFFDF9;
            --text-soft: #FEF08A;
            --border: rgba(255, 215, 0, 0.3);
            --radius: 1rem;
            --shadow: 0 8px 30px rgba(0,0,0,0.35);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: 'Segoe UI', 'Inter', 'Roboto', sans-serif;
            background: var(--primary-dark);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: color .2s; }
        a:hover { color: var(--accent); }
        img { max-width: 100%; display: block; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .header-nav {
            background: rgba(74, 0, 7, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 2px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
        .logo-text { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.5rem; color: var(--accent); }
        .logo-text i { font-size: 1.6rem; }
        .nav-links { display: flex; list-style: none; gap: 28px; align-items: center; }
        .nav-links a { font-weight: 500; font-size: 0.95rem; padding: 6px 0; position: relative; }
        .nav-links a.active, .nav-links a:hover { color: var(--accent); }
        .nav-links a.active::after {
            content: ''; position: absolute; left: 0; bottom: -4px; width: 100%; height: 2px;
            background: var(--accent); border-radius: 2px;
        }
        .nav-auth { display: flex; gap: 12px; align-items: center; }
        .btn-login-text {
            background: transparent; border: 1px solid rgba(255,215,0,0.5); color: var(--text);
            padding: 8px 18px; border-radius: 8px; font-weight: 600; cursor: pointer;
            transition: all .25s;
        }
        .btn-login-text:hover { border-color: var(--accent); color: var(--accent); }
        .btn-signup {
            background: var(--accent); color: var(--primary-dark); border: none;
            padding: 10px 22px; border-radius: 8px; font-weight: 700; cursor: pointer;
            transition: all .25s; box-shadow: 0 4px 15px rgba(255,215,0,0.35);
        }
        .btn-signup:hover { background: #FFE040; transform: translateY(-2px); box-shadow: 0 8px 25px rgba(255,215,0,0.5); }
        .mobile-menu-toggle { display: none; background: none; border: none; color: var(--accent); font-size: 1.6rem; cursor: pointer; }
        .mobile-menu { display: none; background: var(--primary-dark); border-top: 1px solid var(--border); padding: 16px 20px; }
        .mobile-menu a { display: block; padding: 12px 0; border-bottom: 1px solid rgba(255,215,0,0.1); font-weight: 500; }
        .mobile-menu a.active { color: var(--accent); }
        .mobile-menu .nav-auth { display: flex; margin-top: 16px; }
        @media (max-width: 1024px) {
            .nav-links { gap: 16px; }
            .nav-links a { font-size: 0.85rem; }
        }
        @media (max-width: 768px) {
            .nav-links, .nav-auth { display: none; }
            .mobile-menu-toggle { display: block; }
            .mobile-menu.open { display: block; }
        }
        .hero-banner {
            background-image: linear-gradient(rgba(74,0,7,0.88), rgba(74,0,7,0.95)), url('/assets/images/backpic/back-3.jpg');
            background-size: cover;
            background-position: center;
            padding: 80px 0 60px;
            border-bottom: 2px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .hero-banner::before {
            content: ''; position: absolute; top: -50%; right: -10%; width: 400px; height: 400px;
            background: radial-gradient(circle, rgba(255,215,0,0.15), transparent 70%);
            pointer-events: none;
        }
        .hero-banner h1 {
            font-size: 2.8rem; font-weight: 800; color: var(--accent); max-width: 700px;
            margin-bottom: 20px; line-height: 1.2;
        }
        .hero-banner p { font-size: 1.2rem; max-width: 650px; color: rgba(255,253,249,0.9); margin-bottom: 30px; }
        .btn-primary-hero {
            background: var(--accent); color: var(--primary-dark); padding: 16px 36px;
            border-radius: 12px; font-weight: 800; font-size: 1.1rem; display: inline-block;
            box-shadow: 0 10px 30px rgba(255,215,0,0.4); transition: all .3s;
        }
        .btn-primary-hero:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(255,215,0,0.6); }
        .section { padding: 60px 0; }
        .section-title { font-size: 2rem; font-weight: 700; margin-bottom: 40px; text-align: left; color: var(--accent); }
        .section-subtitle { font-size: 1.1rem; color: rgba(255,253,249,0.85); margin-bottom: 40px; text-align: left; max-width: 800px; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
        .card {
            background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
            padding: 30px; transition: all .3s; box-shadow: var(--shadow);
        }
        .card:hover { transform: translateY(-6px); border-color: var(--accent); box-shadow: 0 16px 40px rgba(0,0,0,0.45); }
        .card-icon { font-size: 2.4rem; color: var(--accent); margin-bottom: 16px; }
        .card h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 12px; }
        .card p { color: rgba(255,253,249,0.8); font-size: 0.95rem; }
        .badge {
            display: inline-block; background: var(--accent); color: var(--primary-dark);
            padding: 4px 14px; border-radius: 20px; font-size: 0.8rem; font-weight: 700;
            margin-right: 8px;
        }
        .badge-18 {
            background: #D32F2F; color: #fff; border-radius: 6px; padding: 6px 12px;
            font-weight: 800; font-size: 1rem; display: inline-flex; align-items: center; justify-content: center;
        }
        .step-flow { display: flex; gap: 20px; margin: 40px 0; align-items: flex-start; }
        .step-item { flex: 1; position: relative; }
        .step-number {
            width: 48px; height: 48px; border-radius: 50%; background: var(--accent); color: var(--primary-dark);
            display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 1.3rem;
            margin-bottom: 16px; box-shadow: 0 4px 15px rgba(255,215,0,0.4);
        }
        .step-item h4 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
        .step-item p { font-size: 0.9rem; color: rgba(255,253,249,0.8); }
        .faq-item { border-bottom: 1px solid var(--border); padding: 20px 0; }
        .faq-question { font-weight: 700; font-size: 1.1rem; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height .3s ease; color: rgba(255,253,249,0.8); }
        .faq-item.open .faq-answer { max-height: 300px; padding-top: 12px; }
        .cta-box {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border: 2px solid var(--accent); border-radius: var(--radius); padding: 50px 40px;
            text-align: center; position: relative; overflow: hidden;
        }
        .cta-box::before {
            content: ''; position: absolute; top: -50%; left: -10%; width: 300px; height: 300px;
            background: radial-gradient(circle, rgba(255,215,0,0.2), transparent 70%);
        }
        .cta-box h2 { font-size: 2rem; font-weight: 800; color: var(--accent); margin-bottom: 16px; position: relative; }
        .cta-box p { font-size: 1.1rem; color: rgba(255,253,249,0.9); margin-bottom: 30px; position: relative; }
        .footer {
            background: var(--primary-dark); border-top: 2px solid var(--border);
            padding: 50px 0 30px; margin-top: 60px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 30px; margin-bottom: 30px; }
        .footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.4rem; color: var(--accent); margin-bottom: 16px; }
        .footer-desc { font-size: 0.9rem; color: rgba(255,253,249,0.7); line-height: 1.7; }
        .footer-column h4 { font-size: 1rem; font-weight: 700; color: var(--accent); margin-bottom: 16px; }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a { font-size: 0.9rem; color: rgba(255,253,249,0.7); }
        .footer-links a:hover { color: var(--accent); }
        .copyright { text-align: center; font-size: 0.85rem; color: rgba(255,253,249,0.5); border-top: 1px solid var(--border); padding-top: 20px; }
        .fab-left {
            position: fixed; left: 16px; bottom: 96px; z-index: 50;
            width: 56px; height: 56px; border-radius: 50%;
            background: var(--primary); border: 3px solid var(--accent);
            display: flex; align-items: center; justify-content: center;
            color: var(--accent); font-size: 1.5rem; cursor: pointer;
            box-shadow: 0 4px 20px rgba(255,215,0,0.3);
            transition: all .3s; animation: float 3s ease-in-out infinite;
        }
        .fab-left:hover { transform: scale(1.1); opacity: 1; }
        @keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
        @media (max-width: 1024px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .step-flow { flex-wrap: wrap; }
            .step-item { flex: 1 1 40%; }
        }
        @media (max-width: 768px) {
            .hero-banner h1 { font-size: 2rem; }
            .hero-banner p { font-size: 1rem; }
            .grid-3, .grid-2 { grid-template-columns: 1fr; }
            .section-title { font-size: 1.5rem; }
            .footer-grid { grid-template-columns: 1fr; }
            .step-flow { flex-direction: column; }
            .step-item { width: 100%; }
        }